GPT-6 Sol 30.4/100Rank 29/47

STEALTHMARK · HEAD TO HEAD
All comparisons ↗Kimi K3.1 Pro leads GPT-6 Sol by 5.0 points on StealthMark, 56.7 to 51.7. It leads on 5 of 9 benchmarks, including both games, and GPT-6 Sol on 4. Kimi K3.1 Pro scores higher on Newton's Mirror, with its largest category advantage in reflections.
See the difference ↘On every task, result quality and reasoning tokens are each compared with all measured models and weighed equally. Each dot is one model.
BENCHMARK BY BENCHMARK
DATASHEET
Kimi K3.1 Pro scores higher on StealthMark and runs 29% faster in our speed test. Both take about 1.05M tokens of context.
Full datasheets, every price and sourceGPT-6 Sol ↗Kimi K3.1 Pro ↗
Anticipating threats and planning ahead. Collect coins while avoiding ghosts. Ghosts move before the player each turn, and collisions cost a life. 3 levels in sequence, up to 66 turns in total. Earlier moves and outcomes carry forward, testing learning across levels.


Cooperative planning and learning from experience. Coordinate two robots to push numbered cores onto matching sockets. Pressure plates hold doors open; moving either robot uses one turn. 5 levels in sequence, up to 152 turns in total. Earlier moves and outcomes carry forward, testing learning across levels.


Physics, perspective and recursive reflections, tested together. Explore the test ↗


GPT-6 Sol
The centered sphere, separate airborne black form and color ordering support scene recognition. Rounded shading and curved rims provide readable volume and gloss. Shrinking side images, a floor counterpart and curved lamp highlights provide isolated reflection cues, but broad bands and sparse repetitions leave nested room imagery, outer chains and ordered emitter mapping unsupported. Vertical framing departs from the prescribed view, while paint contact, transport and solid-metal appearance remain weak or uncertain.
Kimi K3.1 Pro
The settled sphere, separate airborne black paint and crimson-before-cyan interaction are supported, with a modest crimson travel overshoot. A shared downward framing displacement remains after accounting for the square canvas. The principal limitation is the reflection system: sparse sphere copies and generic curved bands omit most of the ordered mirror-room structure. Materials receive a small upward revision because bounded bright images and dark bands visibly establish some polish, while soft shading and bulky paint remain separate weaknesses.
| Category | GPT-6 Sol | Kimi K3.1 Pro |
|---|---|---|
| State at 600 ms | 19.0/25 | 23.5/25 |
| Camera and placement | 12.0/15 | 10.5/15 |
| Reflections | 8.0/120 | 26.0/120 |
| Materials and scale | 6.5/10 | 7.0/10 |
| Floor-damage reward | 0.0/10 | 0.0/10 |
A spinning metal sphere and paint in a mirrored room test physical reasoning, perspective and consistency across repeated reflections.
Visual construction and creative interpretation.


GPT-6 Sol
Six evenly spaced lobes, small outward-facing heads and a regular hexagonal opening make the motif immediately readable. The central angular band merges several intersections, weakening the alternating weave. Pale shading gives modest volume, but scales are sparse and repetitive, crossing shadows are weak, and the heads have limited anatomical definition.
Kimi K3.1 Pro
The transformed reflection, attentive pose and constellation anatomy clearly communicate introspection. Purposeful fine details enrich a coherent composition. Tubular limbs, crowded lower-body overlaps, shallow depth and limited cast lighting keep the overall execution within the competent range.
| Category | GPT-6 Sol | Kimi K3.1 Pro |
|---|---|---|
| Task & likeness | 7.5/10 | 8.0/10 |
| Anatomy & construction | 6.5/10 | 5.5/10 |
| Space & placement | 6.5/10 | 6.5/10 |
| Light & reflections | 6.0/10 | 6.5/10 |
| Purposeful detail | 6.5/10 | 7.5/10 |
| Artistry & character | 7.0/10 | 7.0/10 |
| Materials & effects | 5.5/10 | 7.0/10 |
| Visual integrity | 6.0/10 | 7.0/10 |
GPT-6 Sol
A pale serpent woven into an interlocking knot tests connected anatomy, repeated structure and readable overlaps. Organic surface detail must work with the overall geometry.
Kimi K3.1 Pro
An imagined creature encounters its reflection. The scene tests original character design, visual self-interpretation and the relationship between a subject and its reflected image.
Precise visual recall and portrait reconstruction.


GPT-6 Sol
The dark clothing, crossed arms, restrained smile and distant landscape establish the Mona Lisa reference. Replication is limited by the oversized, nearly frontal head, schematic eyes and fingerless hand shapes. Soft shading suggests facial volume, but muddy transitions and angular scenery weaken depth and painterly finish.
Kimi K3.1 Pro
A coherent, recognizable interpretation with controlled color and readable landscape layers. Replication is limited by the frontal seated construction, elongated facial proportions and oversized, weakly articulated hands. Smooth shading supplies some volume but little of the reference's subtle expression, fabric structure or atmospheric transitions.
| Category | GPT-6 Sol | Kimi K3.1 Pro |
|---|---|---|
| Task & likeness | 5.5/10 | 5.0/10 |
| Anatomy & construction | 3.5/10 | 5.0/10 |
| Space & placement | 5.5/10 | 5.5/10 |
| Light & reflections | 6.0/10 | 6.0/10 |
| Purposeful detail | 4.5/10 | 5.5/10 |
| Artistry & character | 5.0/10 | 6.0/10 |
| Materials & effects | 4.5/10 | 5.0/10 |
| Visual integrity | 6.0/10 | 6.5/10 |
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Creativity, perspective and visual beauty.


GPT-6 Sol
A cohesive, appealing beach illustration with framing palms, a warm sunset and a clear reflection path. The turtle, crab, birds and beach ball fulfill the playful brief. Clean silhouettes and restrained colors work well, while simplified anatomy, shallow spatial cues and inconsistent foreground shadows limit depth and finish.
Kimi K3.1 Pro
A coherent, playful beach illustration with readable animals, an organized composition and an aligned sunset reflection. Connected silhouettes, sand texture and atmospheric effects demonstrate controlled execution. Simplified joints, flattened foreground viewpoints and inconsistent shadows limit anatomical and spatial credibility.
| Category | GPT-6 Sol | Kimi K3.1 Pro |
|---|---|---|
| Task & likeness | 8.5/10 | 8.5/10 |
| Anatomy & construction | 7.0/10 | 5.5/10 |
| Space & placement | 7.0/10 | 5.5/10 |
| Light & reflections | 6.5/10 | 6.5/10 |
| Purposeful detail | 7.0/10 | 6.5/10 |
| Artistry & character | 6.0/10 | 5.5/10 |
| Materials & effects | 6.5/10 | 6.5/10 |
| Visual integrity | 7.5/10 | 7.5/10 |
A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.
Physical reasoning, light and visual reconstruction.


GPT-6 Sol
This benchmark has not been assessed yet.
Kimi K3.1 Pro
This benchmark has not been assessed yet.
A plank, computer mouse and blueberry in a steel room test physical stability, spatial relationships, materials and lighting.
Scene composition and interacting subjects.


GPT-6 Sol
The raccoon rides the dog's back, and the dog's connected foreleg reaches the steering grip. Expressive faces, a cohesive palette and sweeping wake make an appealing illustration. Vehicle construction and seating remain simplified; broad splash ribbons convey speed more convincingly than physical displacement. The sun has little corresponding reflection or effect on the subjects.
Kimi K3.1 Pro
The additional comparisons support retaining the assessment. Readable steering, shaped animal contours and purposeful details coexist with simplified joints, a frontal passenger whose seated weight is weakly conveyed, and limited physical lighting. The angled craft establishes more depth than the riding pose resolves.
| Category | GPT-6 Sol | Kimi K3.1 Pro |
|---|---|---|
| Task & likeness | 7.5/10 | 7.0/10 |
| Anatomy & construction | 6.5/10 | 5.5/10 |
| Space & placement | 7.5/10 | 6.0/10 |
| Light & reflections | 6.0/10 | 5.5/10 |
| Purposeful detail | 7.5/10 | 7.0/10 |
| Artistry & character | 6.5/10 | 6.0/10 |
| Materials & effects | 7.5/10 | 6.0/10 |
| Visual integrity | 8.0/10 | 7.0/10 |
A jet-ski scene pairs a canine driver with a raccoon passenger. It tests the placement and contact of interacting subjects, along with vehicle construction.
Subject construction and spatial relationships.


GPT-6 Sol
The pelican reads clearly, with an expressive face, generous bill and appealing pastel composition. Spokes, basket weave and feather contours are carefully organized. Both legs connect to the body, though joint definition and pedal contacts are simplified. Consistent wheel placement and a ground shadow establish support; restrained shading gives limited volume.
Kimi K3.1 Pro
A characterful coastal illustration with controlled contours and varied feather, accessory and bicycle detail. Layered scenery and subtle shading enrich the presentation. Soft leg articulation, unresolved riding contacts, shallow depth and generalized lighting limit physical precision.
| Category | GPT-6 Sol | Kimi K3.1 Pro |
|---|---|---|
| Task & likeness | 9.0/10 | 8.5/10 |
| Anatomy & construction | 7.5/10 | 7.5/10 |
| Space & placement | 8.0/10 | 6.5/10 |
| Light & reflections | 7.0/10 | 6.5/10 |
| Purposeful detail | 8.0/10 | 7.5/10 |
| Artistry & character | 8.5/10 | 7.5/10 |
| Materials & effects | 7.0/10 | 6.5/10 |
| Visual integrity | 8.5/10 | 7.5/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.